Cranberry (Vaccinium macrocarpon) fruit extract is a source of polyphenol antioxidants and flavonoids, such as proanthocyanidins, flavonols, and anthocyanidins, which have antioxidant and anti-inflammatory properties. They can also help to stimulate the synthesis of collagen fibers to strengthen the skin.
Skin Pharmacology and Physiology, September–October 2004, pages 207–213
Progressive Lipid Research, January 2003, pages 1–36
Journal of Lipid Research, May 2002, pages 794–804